Investments in Unconsolidated Entities - Schedule of Cumulative Investment in Entities on Equity Method, Including Share of Earnings and Losses (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
---|---|---|
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | $ 18,999 | $ 16,805 |
Limited Liability Company Interests [Member] | ||
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | 15,739 | 13,710 |
General Partnership Interests [Member] | ||
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | $ 3,260 | $ 3,095 |